Abstract: An apparatus comprises at least two massaging means arranged side by side, each including a vibration application area designed to be applied on the patient in order to transmit vibrations; the two massaging means are located at a distance from each other such that one of said massaging means can be applied essentially opposite the transverse apophysis of a vertebra while the other massaging means can simultaneously be applied essentially opposite the other transverse apophysis of the same vertebra; inclination detecting means arranged along a direction parallel to the direction from one massaging means to the other, this inclination detecting means being for detecting a level difference between the application areas of the two massaging means; and means for operating one or the other of said massaging means according to the level of difference detected between said application areas.